package com.springboot.test.service;

import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.*;
import java.util.UUID;

@Service
public class FileUploadService {

    // 阿里云账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM用户进行API访问或日常运维，请登录RAM控制台创建RAM用户。
    @Value("${oss.accessKeyId}")
    private String accessKeyId;

    @Value("${oss.accessKeySecret}")
    private String accessKeySecret;

    //存储空间名称
    @Value("${oss.bucketName}")
    private String bucketName;

    @Value("${oss.urlPrefix}")
    private String urlPrefix;

    public String fileUpload(MultipartFile file){
        // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";

//         //填写Object完整路径，例如exampledir/exampleobject.txt。Object完整路径中不能包含Bucket名称。
        //通过uuid+文件名作为路径，确保路径不重复
        String uuid = UUID.randomUUID().toString().replace("-", "");


        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
        String url = "";
        try {
            String objectName = uuid + file.getOriginalFilename();
            InputStream in = file.getInputStream();
            ByteArrayOutputStream output = new ByteArrayOutputStream();
            byte[] buffer = new byte[1024];
            int len;
            while((len = in.read(buffer)) != -1) {
                output.write(buffer, 0, len);
            }
            output.flush();
            byte[] bytes = output.toByteArray();
            ossClient.putObject(bucketName, objectName, new ByteArrayInputStream(bytes));
            url = urlPrefix + objectName;
            System.out.println(url);
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
        return url;
    }
}
